/* Architecture pages — dark theme matching index */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500&family=Fraunces:ital,wght@0,300;0,600;1,200&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --bg:       #14120B;
  --bg-2:     #1C1A11;
  --bg-3:     #232018;
  --border:   #2E2B1C;
  --text:     #EDE8D0;
  --text-2:   #A89E7A;
  --text-3:   #5C5840;
  --gold:     #C9A84C;
  --gold-dim: #7A6128;
  --mono:     'IBM Plex Mono', monospace;
  --serif:    'Fraunces', serif;
  --sans:     'DM Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }

/* NAV */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(20,18,11,0.92); backdrop-filter: blur(12px); border-bottom: 0.5px solid var(--border); padding: 0 48px; height: 56px; display: flex; align-items: center; justify-content: space-between; }
.nav-mark { font-family: var(--serif); font-size: 20px; font-weight: 600; color: var(--text); letter-spacing: -0.03em; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { font-size: 11px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); transition: color 0.2s; }
.nav-links a:hover { color: var(--gold); }

/* PAGE */
.arch-page { padding: 96px 48px 80px; max-width: 1100px; margin: 0 auto; }
.page-eyebrow { font-family: var(--mono); font-size: 11px; color: var(--gold); letter-spacing: 0.1em; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.page-eyebrow::before { content: ''; display: inline-block; width: 24px; height: 1px; background: var(--gold); }
.page-title { font-family: var(--serif); font-size: clamp(32px, 4vw, 52px); font-weight: 300; font-style: italic; color: var(--text); line-height: 1.05; letter-spacing: -0.03em; margin-bottom: 12px; }
.page-subtitle { font-size: 16px; color: var(--text-2); margin-bottom: 48px; max-width: 600px; }

/* DIAGRAM */
.diagram-wrap { background: var(--bg-2); border: 0.5px solid var(--border); border-radius: 6px; padding: 32px; margin-bottom: 48px; overflow-x: auto; }
.diagram-wrap svg { display: block; margin: 0 auto; }

/* SECTIONS */
.arch-section { margin-bottom: 48px; }
.arch-section h2 { font-family: var(--serif); font-size: 24px; font-weight: 300; color: var(--text); letter-spacing: -0.02em; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 0.5px solid var(--border); }
.arch-section h3 { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 8px; }
.arch-section h4 { font-family: var(--mono); font-size: 11px; color: var(--gold); letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 8px; }
.arch-section p { font-size: 14px; color: var(--text-2); line-height: 1.7; margin-bottom: 12px; }
.arch-section ul { list-style: none; padding: 0; }
.arch-section ul li { font-size: 14px; color: var(--text-2); padding: 5px 0; padding-left: 16px; position: relative; border-bottom: 0.5px solid var(--border); }
.arch-section ul li::before { content: '—'; position: absolute; left: 0; color: var(--gold); font-size: 12px; }
.arch-section ul li strong { color: var(--text); }

/* CARD GRIDS */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1px; background: var(--border); border: 0.5px solid var(--border); border-radius: 4px; overflow: hidden; margin-bottom: 24px; }
.card { background: var(--bg-2); padding: 24px; transition: background 0.2s; }
.card:hover { background: var(--bg-3); }
.card h3 { font-size: 14px; font-weight: 500; color: var(--text); margin-bottom: 8px; }
.card p { font-size: 13px; color: var(--text-2); line-height: 1.6; margin-bottom: 10px; }
.card ul { margin-top: 8px; }
.card ul li { font-size: 12px; border-bottom: 0.5px solid var(--border); }

/* SAMPLE LINKS */
.sample-link { display: block; background: var(--bg-2); border: 0.5px solid var(--border); border-radius: 4px; padding: 18px 20px; margin-bottom: 8px; transition: border-color 0.2s, background 0.2s; }
.sample-link:hover { border-color: var(--gold-dim); background: var(--bg-3); }
.sample-link h4 { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 4px; }
.sample-link p { font-size: 12px; color: var(--text-2); margin: 0 0 8px; }
.link-badge { font-family: var(--mono); font-size: 9px; color: var(--gold); border: 0.5px solid var(--gold-dim); padding: 2px 8px; border-radius: 2px; letter-spacing: 0.05em; }

/* WHITEPAPER LINKS */
.whitepaper-link { display: block; background: var(--bg-2); border: 0.5px solid var(--border); border-radius: 4px; padding: 18px 20px; margin-bottom: 8px; transition: border-color 0.2s, background 0.2s; }
.whitepaper-link:hover { border-color: var(--gold-dim); background: var(--bg-3); }
.whitepaper-link h4 { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 4px; }
.whitepaper-link p { font-size: 12px; color: var(--text-2); margin: 0 0 8px; }

/* COMPARISON TABLE */
.compare-table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 16px; }
.compare-table th { font-family: var(--mono); font-size: 10px; color: var(--gold); letter-spacing: 0.06em; text-transform: uppercase; padding: 10px 14px; border-bottom: 0.5px solid var(--border); text-align: left; }
.compare-table td { padding: 10px 14px; border-bottom: 0.5px solid var(--border); color: var(--text-2); }
.compare-table tr:hover td { background: var(--bg-2); }

/* FOOTER */
.arch-footer { margin-top: 80px; padding-top: 24px; border-top: 0.5px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.arch-footer p { font-family: var(--mono); font-size: 10px; color: var(--text-3); }
.back-link { font-family: var(--mono); font-size: 10px; color: var(--gold); border-bottom: 0.5px solid var(--gold-dim); padding-bottom: 1px; }
.back-link:hover { border-color: var(--gold); }

@media (max-width: 768px) {
  .navbar { padding: 0 20px; }
  .nav-links { gap: 16px; }
  .arch-page { padding: 80px 20px 60px; }
}